Device for detecting inaccurately-fed sheets of paper.



M. M. KANDLE. DEVICE FOR DETEUTING INAGGURATELY FED SHEETS OF PAPER.

APPLICATION FILED DBO. 31,1908.

Patented June 1, 1909.

AWE/V7015 WITNESSES:

W M ATTORNEY.

-ments in reset mechanisms for printing nniirn ears PATEN enrich MATTHIAS M. KANDLE, OF LONGMEADOW, MASSACHUSETTS, ASSIGNOR TO SPRINGFIELD PRINTING & BINDING COMPANY, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION.

DEVICE FOR DETECTING INAGCURATELY-FED smn'rs OF PAPER.

Specification of Letters Patent.

Patented June 1, 1909.

Application filed. December 81, 1908. Serial No. M0326,

l-lampden and State of Massachusetts, have invented new and useful Improvements in Devices for Detecting Inaccurately-Fed Sheets of Paper, of which the following is a specification.

My present invention relates to improvepresses and is especially adapted for multicolor printing, and more particularly it is an improvement on the construction shown, described, and claimed in my prior United States Letters Patent for improvement in Devices for detecting inaccurately fed sheets of paper dated December 29, 1908 and numbered 908,412.

The invention in said prior patent relates 'whollyto the detection and rejection of an inaccurately gfed sheet of paper, but does not contain any automatic means for resetting the mechanism after a sheet has been detected and rejected. In said patent, in order to reset the mechanism after the sheet has been detected and rejected,'it is necessary to use manual or foot means for effecting this resetting of the press, and such means fcrresetting the mechanism causes annnnecessary amountof time and labor for the operative who has charge of the printing operation. It is therefore with this end in view that my present invention has been devised for in creasing the cfliciency of the printing press.

Broadly, the present invention consistsin associating with the electro magnet lock of my aforesaid prior patent, means for efiecte ing the reset of the paper-detecting and re jecting mechanism after the operation of said mechanism by an inaccurately fed or placed sheet of paper-in the press.

In the drawings forn'iing part of this ap plication,-Fignre 1 is a diagregnmatic view of my improvements showing such ell -the press as is necessary to clearly 1 my invention, and particularly the means for causing the mechanisms to operate when an inaccurately fed. sheet of paper is placed in the machine, Fig. 2 is a detail perspective view of the locking means between the electro magnetic latch mechanism and the lever i u which is actuated by the main camsha'tt rcr 'a designates the usual printing roller pro er; h the foot-board, and c the feed-table of press, The mam cam-shaft is desi 'natcd'by ustrate cfiecting the resetting of the detecting mechanism. l

Referring to these drawings in detail,-

the

d. The stops or guides which are ocated at right angles'to each other, are shown at c. The details of the construction of these guides are clearly shown in my aforesaid prior patent and also the clctromagnetic lock, at f.

The battery and the l'nanu'ally operated switch is shown at g and h, and the .wiring connection between the stops 6 and the lock f at it and Electrically connected to the wire 5 is a contact-piece j with which engages a brush is. This contact-piece is carried on the surface of an insulated ring m which is secured to the press cam-shaftd and it will therefore be apparent that when the brush is engages the contact-piece j the electric circuitwillhe completed through the stops 6, batl'cry it, switch g, and electro magnetic lock f.

The lock f is not operated unless the sheet of paper is inaccurately fed,; that is, the contact points at one of the stops e will be closed causing; a current to flow 'to the lock f and actuate the same, as fully described in my prior patent.

Secured to the press rain-shaft die a cam it with which engages the anti-friction roller 0 of the lever 2 that is pivoted at g on the. upper end of a standard it tension spring .9 normally holds the lever p and roller 0 in engagement with the cam n whereby this lever is constantly vi hrated about its pivotal point- 9 causing it outer end 25 to alternately rise and fall. Tlhi end or the lever has attached thereto a hook uhy means of a pivot connection '0. This hook is guided in its rising and falling movements by means of a bent arm or heels '10 that is secured to the upright red at which is pii'otally connected to the latc nhar y of the electro'iiiagnetic lock 7". l

The rod :1: is pivotaliy connected to. the latclrhar 3/ oil? the electrtrumgnctic lock at the point a and extends upward through. the icchhoarsj. h of the press, as shown at 2. Secured to the rod are two collars 3 and. t that are prnvidcd with radially projecting pins 5 and 6. The pin (3 serves in connection With the hook to to normally prevent the upper end of the hook u from engaging the pin 5 during the rising and falling ol. the outer end t of the lever The link connection, designated by the reference characters 7, S, 9, l0 and 1.1, that extends between the latch-lever 3 and the reieeting fingers 12 is the same as that shown and described in my aforesaid prior patent N. ()Qth-tll. The latch lever y is pivoted to th ains 13 at the point 1 15 designates a; ten on spring that extends bet veen the bottom of the toot-board Z) and the outer end i of the latch-lever y. The stops 0 are raised and lowered by the cam 16 and arm 17. in the same manner as described in my said. *pacent in order to allow the sheets of paper "to be fed to the printing roller in the usual manner.

Referring now to the operation of my improvement: It is understood that the sheet of paper which is shown in dotted lines at 18 is inaccurately fed, that is to say it does not break the electric circuit at, all of the :teps or guides e,. and the circuit is therefore closed to the electromagnetic lock f, perinittinga current to flow to the electro magnets shown in dotted lines at 19 of the lock. 1

The contact-piece j and the brush 7c are supposed to be in contact at. this time, that is to say the brush engages the piece a slight interval of time before the steps or guides c are operated. This current rcleases the latch-lever g from its locked position and by the aid of the spring 15 the latch-lever is violently thrown to the dotted line position 20 causing the upper end of the hook u to be moved into the path of the pin 5 on the rod 00: Then, when the rod is operated by the cam n from the shaft (Z, the lever 3 will be automatically reset by the press-cam.

The operation of the rejecting fingers 1:

will be actuated by the spring It will. therefore be seen that the elements n, o. g), g and hook it acting on the lateh-lcvm- 'I serve l to automatically reset the electro magnetic block ready for another operat-it'in.

ceases W'hat- I claim,

l. A reset mechanism for printing;- presses having in combination with the press camshaft, a lever operable therefrom, a latchlcver, a rejecting tingcr, connecting means between the latch-lever and said finger, and means for causing;- the latclrlevcr to be reset, or moved to its usual position by said lever, when the latclrlever is released. and electio i'nagnetically operated means for releasing the latch-lever.

A reset mechanism l'or printing presses having .in coi'nbination \vith thegnidcsmcans for detecting inzwcuratcly icd sheets of paper, and an elcctro-magnetically released latchlevcr electrically connected to said guides when the paper is so fed. rejecting fingers, a press-cam shai't. a lever operable therefrom, means carried by the latch'lcvcr for causing said lever to reset the latch-lever and said fingers after the latch has been released, asdescrihcd.

3. A mechanism ot the class described comprising a lover, a cam for operating the same, an elcctro-nnignctically released latchlcvcr, :1 rejecting linger connected to the latch-lever, means for resetting the latchlever t'rom the said first. mentioned lever after the latch-lever has been released. said means including a hook element carried by the lever.

A mechanism of the class described comprising a lcr r, a cam for operating the same, an. electroomignctically released latch-lever,

a rejecting linger connected to the latch- M ATTH lfJ-iS M. KA N Did Wit nesses:

K. T. CLEMONS, Haney Wl Bowen. 

